Problem 17-47 Derive Amounts for Profit Variance Analysis (LO 17-5) Classics, Ltd., details cars. Classics wants to compare this quarter's results with those for last quarter, which is believed to be typical for operations. Assume that the following information is provided: Last Quarter This Quarter Number of detailings Variable costs Contribution margin 560 763 $75,040 29,120 S45,920 S71,200 35,520 535,680 Required: Compute the flexible budget and sales activity variance and prepare a profit variance analysis. (Hint: Use last quarter as the master budget and this quarter as "actual.") Do not round intermediate calculations. Indicate the effect of each variance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option.) Variable Cost Variance Flexible Bud Sales Activity Variance Master Bud Actual Sales Price Variance Sales revenue Less Variable Costs Contribution margin What impact did the changes in number of detailings and average revenues (i.e., sales price) have on Classics, Ltd.'s contribution margin? (Do not round intermediate calculations.) Contribution margi